1 // tilemgr.hxx -- routines to handle dynamic management of scenery tiles
3 // Written by Curtis Olson, started January 1998.
5 // Copyright (C) 1997 Curtis L. Olson - http://www.flightgear.org/~curt
7 // This program is free software; you can redistribute it and/or
8 // modify it under the terms of the GNU General Public License as
9 // published by the Free Software Foundation; either version 2 of the
10 // License, or (at your option) any later version.
12 // This program is distributed in the hope that it will be useful, but
13 // WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 // General Public License for more details.
17 // You should have received a copy of the GNU General Public License
18 // along with this program; if not, write to the Free Software
19 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
27 #include <simgear/compiler.h>
28 #include <simgear/scene/model/location.hxx>
30 #include <simgear/bucket/newbucket.hxx>
31 #include <simgear/scene/tgdb/TileEntry.hxx>
32 #include <simgear/scene/tgdb/TileCache.hxx>
34 class SGReaderWriterBTGOptions;
41 class FGTileMgr : public simgear::ModelLoadHelper {
54 // initialize the cache
55 void initialize_queue();
57 // schedule a tile for loading
58 void sched_tile( const SGBucket& b, const bool is_inner_ring );
60 // schedule a needed buckets for loading
61 void schedule_needed(double visibility_meters, const SGBucket& curr_bucket);
63 SGBucket previous_bucket;
64 SGBucket current_bucket;
66 osg::ref_ptr<SGReaderWriterBTGOptions> _options;
68 // x and y distance of tiles to load/draw
72 // current longitude latitude
80 simgear::TileCache tile_cache;
87 // Initialize the Tile Manager
90 // Update the various queues maintained by the tilemagr (private
91 // internal function, do not call directly.)
94 // given the current lon/lat (in degrees), fill in the array of
95 // local chunks. If the chunk isn't already in the cache, then
97 int update( double visibility_meters );
98 int update( SGLocation *location, double visibility_meters);
100 // Prepare the ssg nodes corresponding to each tile. For each
101 // tile, set the ssg transform and update it's range selector
102 // based on current visibilty void prep_ssg_nodes( float
103 // visibility_meters );
104 void prep_ssg_nodes(float visibility_meters );
106 const SGBucket& get_current_bucket () const { return current_bucket; }
108 /// Returns true if scenery is avaliable for the given lat, lon position
109 /// within a range of range_m.
110 /// lat and lon are expected to be in degrees.
111 bool scenery_available(double lat, double lon, double range_m);
113 // Load a model for a tile
114 osg::Node* loadTileModel(const string& modelPath, bool cacheModel);
116 // Returns true if all the tiles in the tile cache have been loaded
117 bool isSceneryLoaded();
121 #endif // _TILEMGR_HXX